Dell Inspiron 531S Owner's  Manual - Page 20

4 center/subwoofer Use the orange connector to attach a speaker to a Low connector Frequency Effects (LFE) audio channel. LFE audio channel is found in digital surround sound audio schemes that carries only low frequency information of 80 Hz and below. The LFE channel drives a subwoofer to provide extremely low bass extension. Systems not using subwoofers can shunt the LFE information to the main speakers in the surround sound set-up. 5 line-in connector Use the blue line-in connector to attach a record/playback device such as a cassette player, CD player, or VCR. On computers with a sound card, use the connector on the card. 6 front L/R line-out connector Use the green line-out connector (available on computers with integrated sound) to attach headphones and most speakers with integrated amplifiers. On computers with a sound card, use the connector on the card. 7 microphone Use the pink connector to attach a personal computer microphone for voice or musical input into a sound or telephony program. On computers with a sound card, the microphone connector is on the card. 8 side L/R surround Use the gray connector to provide enhanced surround audio connector for computers with 7.1 speakers. On computers with a sound card, the microphone connector is on the card. 9 rear L/R surround Use the black surround connector to attach multichannel- connector capable speakers. 10 USB 2.0 connectors (4) Use the back USB connectors for devices that typically remain connected, such as printers and keyboards. It is recommended that you use the front USB connectors for devices that you connect occasionally, such as joysticks or cameras. 11 VGA video connector Connect the monitor's VGA cable to the VGA connector on the computer. On computers with a video card, use the connector on the card. 20 Setting Up and Using Your Computer